/*******************************************************************************
 ** Government Sanctioned Espionage RPG                                       **
 ** http://www.government-sanctioned.us/                                      **
 **===========================================================================**
 ** Name: fuzzy.cpp                                                           **
 ** Description: Fuzzy logic sets.                                            **
 **                                                                           **
 ** Open Source Initiative (OSI) Approved License                             **
 **                                                                           **
 ** The contents of this file are subject to the terms of the                 **
 ** Common Development and Distribution License, Version 1.0 only             **
 ** (the "License").  You may not use this file except in compliance          **
 ** with the License.                                                         **
 **                                                                           **
 ** You can find a copy of the license in the LICENSE file within             **
 ** this distribution or at $WIKI/display/GOVT/License-software.              **
 ** Software distributed under the License is distributed on an "AS IS"       **
 ** basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.           **
 ** See the License for the specific language governing permissions           **
 ** and limitations under the License.                                        **
 **                                                                           **
 ** When distributing Covered Code, include this CDDL header in each          **
 ** file and include the License file at $GAME_DIR/LICENSE.                   **
 ** If applicable, add the following below this header, with the indicated    **
 ** fields enclosed by brackets "[]" replaced with your own identifying       **
 ** information: Portions Copyright [yyyy] [name of copyright owner]          **
 **                                                                           **
 ** Copyright (c) 2009-2012  Barry Gian James <gian@gamingods.net>            **
 ** All rights reserved.                                                      **
 ******************************************************************************/

// $Id$
// Modified $Date$ by $Author$

#include "fuzzy.hpp"

namespace fuzzy
{

double
category::membership(double i)
{
	double output, midlow, highmid;

	midlow = _mid - _low;
	highmid = _high - _mid;

	if ( (i <= _low) || (i >= _high) )
		output = 0;
	else
	{
		if (i > _mid)
			output = (_high - i)/highmid;
		else if (i == _mid)
			output = 1.0;
		else
			output = (i - _low)/midlow;
	}
	return output;
}


}	/* namespace fuzzy */
